Malicious PDF — malware analysis report

Static analysis result for SHA-256 094ca969caf5e902…

MALICIOUS

PDF

46.2 KB Created: 2020-08-20 20:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba72a03c04d49c1f4846bb4438d68f53 SHA-1: 48ac18e4435612402e52d25860e27ac0107955de SHA-256: 094ca969caf5e9025c6ae472051c1bc2e267e44404378c5d57748a12183cfcb4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of the embedded URLs, https://ttraff.cc/pify?keyword=bmp+to+jpg, is flagged as a malicious redirector. The document body, though partially garbled, contains the text 'Bmp to jpg' and the malicious URL, suggesting a lure to disguise the malicious intent of the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=bmp+to+jpg
    • http://purixun.jdmdesigner.com/uploads/1/3/0/7/130776445/befokugoniwezivi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0432/5838/0450/files/xezikasadobaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/dagofonesezibejozutuvuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/ethical_theories_and_principles.pdf
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/85432806794.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/california_dmv_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/hebrew_bible_in_english_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/agricultural_extension_and_communication.pdf
    • https://cdn.shopify.com/s/files/1/0440/2351/3238/files/famafibagulizajenipidizom.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6267/files/fasesetaduvuvifedodivix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/66595885977.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/47672469852.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/busybox_pro_apk_onhax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/sample_bio.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d93.bin
367e462f7fd7651b771319c85cb23819cd03b86e738136310e6e3f967f1d96a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D93 4748 bytes
font_01_sfnt_off00006dae.bin
7759c04c9144bc336466b56dc2d89d08f65733730a68e016cf3a26a06a3fc9d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAE 9700 bytes
font_02_sfnt_off000088de.bin
9aedd804d0cd3ba8855ba50f98f69f2bbf9fb26549471b79f6bb2c79c3e39bd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88DE 10240 bytes

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